Does temperature cause a basketball to bounce differently?

Answers

It does. Warmer air temperature will make the air inside the ball expand because the molecules are moving more, so that it will bounce higher. Conversely, colder temperatures will make the air and even the ball itself shrink, so that it won’t bounce as high. The cold will also change the properties of the skin of the ball, making it more hard and brittle: less bouncy. Extremely cold temperatures could even make it shatter.

WikiAnswers recommends putting your basketball in the freezer to see for yourself.